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LCLS Update

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With good progress and funding availability, project engineering and design could start in FY03 and construction in FY04

LCLS CD-0

CD-0, Approve Mission Need

for the

Linac Coherent Light Source (LCLS)

Office of Basic Energy Sciences

Office of Science

A. Justification of Mission Need

1. Office of Basic Energy Sciences Program Mission

The mission of the Office of Science is “To advance basic research and the instruments of science that are the foundations for DOE’s applied missions, a base for U.S. technology innovation, and a source of remarkable insights into our physical and biological world and the nature of matter and energy.” The Linac Coherent Light Source (LCLS) project is a unique opportunity for a major advance in carrying out that mission.

The Office of Basic Energy Sciences (BES) within the DOE Office of Science currently operates four major synchrotron facilities: the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory, the Stanford Synchrotron Radiation Laboratory (SSRL) at the Stanford Linear Accelerator Center (SLAC), the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory and the Advanced Photon Source (APS) at Argonne National Laboratory. These four facilities provide world-class X-ray probes of matter to an enormous user community that spans a broad range of the physical and biological sciences. BES is dedicated to the stewardship of the current light sources, as evidenced by the ongoing upgrades to SSRL, and to advancing the state-of-the art in X-ray probes of matter through the development of next-generation sources and instruments.

In the early 1990s, it became clear that the next-generation X-ray light source would be based on a linac-driven, x-ray free electron laser (XFEL). As early as 1992, workshops began to better define the properties of such an XFEL and the science that would be enabled. In 1994, the National Research Council published a study, Free Electron Lasers and Other Advanced Sources of Light, Scientific Research Opportunities, that reached the conclusion that FELs were not competitive with conventional lasers for scientific applications except in the X-ray region.